[sdiy] DIY help needed

[John L Marshall]

Jumping LED's: www.velleman-kit.com  VU meter kits and color organ kits.

That stuff inside the speaker box is a crossover network, filters to route the signal to the correct speaker. Low frequencies (say less than 200 Hz) to the woofer, Mid frequencies (perhaps 200 Hz to 4 kHz) to the a...... Mid range speaker, and High frequencies (greater than 4 kHz) to the tweeter.

I'm getting crankier as I get older. Another peeve. I was at a dance Saturday night. The DJ was using a pair of popular 2-way powered speakers (made in the Seattle area) with a 15 inch woofer and a horn tweeter. The sound was awful. The light went on. Those two ways with giant woofer and horn seldom sound good. What is the most important range of frequencies for clear voice and instrument fundamentals? The mids. At what frequency range is the crossover from 15 inch woofer to the horn? Right in the middle of voice frequencies. Do filters shift phase at crossover? Use a three way any day.

Why are those two-way popular. Kids, Thump and Sizzle. 
  ----- Original Message ----- 
  From: vladimir yurkov 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Tuesday, October 30, 2001 4:11 PM
  Subject: [sdiy] DIY help needed


  Hello people,
  I am building my own control thingy for my speakers and stereo, i have the equalizer all built and workin, now im not sure how to call this but basicaly i wana make rows of LED's (light emiting diodes) and make then *jump* to the beat of the music. Could anyone please direct me to some schematics? or maybe just where to start looking.

  Another thing, im sure some of you have made your own DIY loud speakers, wel what is really in it? thers the speakers (subwhoofers, tweeters etc.) and thers a little circuit...what is it and what exactly does it do? and any schematics on that? 

  thanks a bunch! :)
  vyurkov 
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